671722 - server not found until restart

Status: RESOLVED INCOMPLETE

(Firefox :: General, defect)

Description

[Craig]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:5.0) Gecko/20100101 Firefox/5.0
Build ID: 20110615151330

Steps to reproduce:

First, and I know you hate this, I can not reproduce it, it is very inconsistent. At certain times, it happened again just now, I get a server not found error that is persistent until I restart firefox. There is no site that causes it and no site is immune from it. I am running the latest firefox on the latest dos box (7). One good sample is at the start my home page appears, I surf the web for a while and click the home button and get server not found. I restart firefox and the home page appears. I was just at craigslist looking at entries and after reading five I got the server not found and could not do anything on craiglist until I restarted firefox and it worked.


Actual results:

detailed above


Expected results:

I am not convinced that having to restart firefox to visit site that I frequent is a feature. P.S. I use adblock with one subscription and flasblock too. This error has occurred in the past three releases, I was hoping it would go away...

Comment 1

[Matthias Versen [:Matti]]

It's very likely that this is no Gecko bug but rather a router bug or better a bug in the DNS forwarder running on your router. This could be triggered by the DNS prefetching. open about config and create a new boolean entry "network.dns.disablePrefetch" set to "true" to disable this feature for a test.
What kind of router are you using ?

Comment 2

[Craig]

I am not aware of any router I am using. The connection is DSL. The PC is connected to the DSL modem and the modem is connected to the telco box out by the street. I will try disabling the prefetch. The problem happens so rarely that I won't know if disabling the prefetch solves the problem for a long time.

Comment 3

[N. D.]

I get this too after updated to Firefox 19.

OS: Windows 7 x86_64

This happens when I open a page from domain, then close it and after a while i try to open a different or the same page from this domain. Then firefox shows me "Server not found" message. When i try to ping the domain name i get Destination host unreachable message. And when i try to open that page in different browser - there is no error and the ping is OK.

It doesn't happen every time. I don't know how to invoke this bug or the reasons that cause it. I haven't tried if restarting firefox works.

This is not a network/router problem, because when i cannot open a page from one computer, i can open it from another computer in my local area network.

The first time when this bug appears was yesterday (25.02.2013) and since then i happens at least 6 times.

I will try if the fix of :Matti  works.

This could be a virus or something else, but Microsoft Security Essentials does not find any threats.

Comment 4

[mdd0127iv]

I am also experiencing this bug on three different computers that all have the latest version of firefox.  This bug started immediately after updating these computers. There are two computers on the same network that have not been updated in at least a year and they work fine.  I've been looking at the error console and after going to my homepage, yahoo, there are hundreds of different errors.  In fact, every page that I go to causes a bunch of errors, even pages that display correctly.  If I restart firefox, sites that were randomly coming up as "page not found" are again accessible, but after a while, they'll randomly be not found again.  This is extremely frustrating and doesn't affect internet explorer unless firefox has been used without success to attempt to access a page immediately before trying it in IE.  If I click the diagnose network connections tab, the site will come up normally after the diagnostic wizard comes up with nothing wrong.

Comment 5

[minalear]

I'm having the exact same issue, and followed every step found on the support pages.  Other browsers work perfectly fine, but Firefox fails to load pages at random times.  A restart fixes this.  I've tried all the solutions found on the forums, together and separate.  I tried a clean uninstall/reinstall to no avail.  I'm one step removed from just reinstalling my entire OS and, frankly, that's not an option.  Such a bizarre issue too considering I've used Firefox for years and now only has it been acting up.

Comment 6

[michael]

(In reply to minalear from comment #5)
> I'm having the exact same issue, and followed every step found on the
> support pages.  Other browsers work perfectly fine, but Firefox fails to
> load pages at random times.  A restart fixes this.  I've tried all the
> solutions found on the forums, together and separate.  I tried a clean
> uninstall/reinstall to no avail.  I'm one step removed from just
> reinstalling my entire OS and, frankly, that's not an option.  Such a
> bizarre issue too considering I've used Firefox for years and now only has
> it been acting up.

Hello 

Sorry for this issue. Have you attempted : creating a new profile to work on. https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles. If not, please give it a try and report back.

Comment 7

[Wayne Mery (:wsmwk)]

Craig, do  you still see this issue?

Comment 8

[Phoenix]

Resolved per whiteboard